CN109695985A - Sample cavity for restricted clearance is independent and dismountable low-loss liquid helium Dewar - Google Patents
Sample cavity for restricted clearance is independent and dismountable low-loss liquid helium Dewar Download PDFInfo
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- CN109695985A CN109695985A CN201811635596.7A CN201811635596A CN109695985A CN 109695985 A CN109695985 A CN 109695985A CN 201811635596 A CN201811635596 A CN 201811635596A CN 109695985 A CN109695985 A CN 109695985A
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- pipe
- cylinder
- capping
- cold
- vestlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
Abstract
Independent and dismountable low-loss liquid helium Dewar the invention discloses the sample cavity for restricted clearance, five cylinders including increasing diameter simultaneously constitute above nested structure, five root canals of increasing diameter and the lower nested structure of composition, cold vestlet first and cold vestlet second and constitute pair cold cover structures, the lower section of nested structure and coaxial on lower nested structure, double cold cover structures are in the lower section of lower nested structure and coaxial.The compact low-loss liquid helium Dewar of height of the sample cavity separate removable can bring better prospect of the application.
Description
Technical field
The present invention relates to liquid helium Dewar fields, in particular to independent and dismountable low damage for the sample cavity of restricted clearance
Consume liquid helium Dewar.
Background technique
Measurement under low temperature environment is a key areas of modern science and technology, and liquid helium Dewar is storage Low Temperature Liquid
Body carries out a kind of more satisfactory container studied under low temperature and tool, for liquid helium Dewar, can obtain effective extremely low Wen Huan
Border；Next possesses the adiabatic system that can keep such low temperature environment for a long time, so liquid helium Dewar is in low-temperature measurement field
Using more and more extensive, importance is more and more prominent.
The people of more concern along with to(for) material property under extreme conditions, more and more measurements will be needed in pole
It is completed under the conditions of end, such as in the detection of material properties under extremely low temperature, strong magnetic field circumstance, it is necessary to which liquid helium Dewar is answered
With, and these extreme environments, Spatial General 6 R are all limited, such as in the magnet for providing high-intensity magnetic field, bore is generally all very
Small, this requires the outer diameters of Dewar cannot be too big, also needs to be put into measuring device inside Dewar, then it is bigger for requiring the internal diameter of Dewar
It is better, the two result in jointly the Dewar being placed in magnet space be it is inside and outside all limited, in the condition that internal-and external diameter is limited
Under, there are three difficult points in design for Dewar:
One is guaranteeing the independence of its sample cavity, the independent of sample cavity is very necessary, independent sample for measurement
Product chamber can be realized by logical exchanging gas to cool down to sample, provides more selectivity for measuring condition；
The second is guaranteeing the detachability of sample cavity, detachability can greatly facilitate our use, be conveniently replaceable sample
Product；
The third is how under the premise of inside and outside limited to obtain optimal insulation effect, the loss of liquid helium is preferably minimized.
But specific technical solution is not found in the prior art and solves these three difficult points.
Summary of the invention
Independent and dismountable low-loss liquid helium the main purpose of the present invention is to provide the sample cavity for restricted clearance
Dewar can effectively overcome the difficult point in background technique.
To achieve the above object, the technical scheme adopted by the invention is as follows:
Sample cavity of the present invention for restricted clearance be independent and dismountable low-loss liquid helium Dewar, including increasing diameter
Five cylinders, are referred to as from thick to thin: cylinder first, cylinder second, cylinder third, cylinder fourth, cylinder penta, they are coaxial to be set in together, and vertical
It is arranged, nested structure in composition,
Further include five root canals of increasing diameter, is referred to as from thick to thin: first pipe, second pipe, the third pipe, Ding Guan, penta pipe, it
It is coaxial be set in together, constitute lower nested structure, the lower nested structure be in the lower section of the upper nested structure and and its
It is coaxial,
The upper end of the cylinder first and upper capping first are tightly connected, and the lower end of the cylinder first and lower capping first are tightly connected, institute
The lower end for stating lower capping first is connected by way of flange seal with the upper end of the first pipe,
The upper end of the cylinder second and upper capping second are tightly connected, and the upper capping second is fixedly installed with liquid nitrogen transfusion pipe, institute
The lower end and lower capping second for stating second are tightly connected, and the lower end of the lower capping second passes through vacuum-packed mode and the second pipe
Upper end be connected,
The upper end of the cylinder third and upper capping third are tightly connected, and the lower end of the cylinder third and lower capping third are tightly connected, institute
The lower end for stating lower capping third is connected by vacuum-packed mode with the upper end of third pipe,
The upper end of the cylinder fourth and upper capping fourth are tightly connected, and the upper capping fourth is fixedly installed with On Tranofer Tube For Liquid Helium, institute
The lower end and lower capping fourth for stating a fourth are tightly connected, and the lower end of the lower capping fourth passes through vacuum-packed mode and the fourth pipe
Upper end be connected,
The lower end of the cylinder penta is connected by vacuum-packed mode with the upper end of penta pipe,
It is described it is upper capping third top and it is described it is upper capping second top respectively with the both ends of own pipe be tightly connected, it is described oneself
Pipe is coaxially placed on except the cylinder penta,
It further include cold vestlet first and cold vestlet second, the cold vestlet first is coaxial to be sleeved on except the cold vestlet second, is constituted
Double cold cover structures, double cold cover structures are in the lower section of the lower nested structure and coaxial,
The bottom for the interlayer that the second pipe and third pipe are formed is sealing, and passes through fastener and the cold vestlet first
Upper end be connected,
The bottom for the interlayer that the fourth pipe and penta pipe are formed is sealing, and by quoit sealing flange with it is described
The upper end vacuum sealing of cold vestlet second connects.
Preferably, the first pipe, the cold vestlet first, be separately provided in the cold vestlet second introducing the optics of light
Window, and the height of this three groups of optical windows is consistent.
Preferably, the own pipe is fixedly installed with radiation protection piece；It is additionally provided with pipe in heptan, manages the heptan and coaxial is set in institute
The inside of own pipe is stated, the lower end of the pipe in heptan is connected with the bottom of the own pipe, and the upper end is connected with the cylinder penta, the pipe in heptan
Material be oxygen-free copper.
Preferably, it is provided with capillary in the upper capping first, the other end of the capillary is inserted into the fourth pipe and penta
Among the interlayer that pipe is formed.
Preferably, the outer surface of the cylinder fourth is fixedly installed with alternate multilayer aluminum laminated films and vacuum insulation fibrous paper,
The outer surface of the lower capping fourth is provided with active carbon.
The present invention realizes that technical solution used by above-mentioned purpose is also possible to:
Sample cavity of the present invention for restricted clearance be independent and dismountable low-loss liquid helium Dewar, including increasing diameter
Five cylinders, are referred to as from thick to thin: cylinder first, cylinder second, cylinder third, cylinder fourth, cylinder penta, they are coaxial to be set in together, and vertical
Setting constitutes upper nested structure,
Further include four root canals of increasing diameter, be referred to as from thick to thin: first pipe, second pipe, Ding Guan, penta pipe, they are total
Axle sleeve is fitted together, and constitutes lower nested structure, and the lower nested structure is in the lower section of the upper nested structure and coaxial,
The upper end of the cylinder first and upper capping first are tightly connected, and the lower end of the cylinder first and lower capping first are tightly connected, institute
The lower end for stating lower capping first is connected by way of flange seal with the upper end of the first pipe,
The upper end of the cylinder second and upper capping second are tightly connected, and the upper capping second is fixedly installed with liquid nitrogen transfusion pipe, institute
The lower end and lower capping second for stating second are tightly connected,
The upper end of the cylinder third and upper capping third are tightly connected, and the lower end of the cylinder third and lower capping third are tightly connected,
The bottom for the interlayer that the lower capping second and the lower capping third are formed is sealing, and the side for passing through sealing welding
Formula is connected with the upper end of second pipe,
The upper end of the cylinder fourth and upper capping fourth are tightly connected, and the upper capping fourth is fixedly installed with On Tranofer Tube For Liquid Helium, institute
The lower end and lower capping fourth for stating a fourth are tightly connected, and the lower end of the lower capping fourth passes through vacuum-packed mode and the fourth pipe
Upper end be connected,
The lower end of the cylinder penta is connected by vacuum-packed mode with the upper end of penta pipe,
It is described it is upper capping third top and it is described it is upper capping second top respectively with the both ends of own pipe be tightly connected, it is described oneself
Pipe is coaxially placed on except cylinder penta,
It further include cold vestlet second, the cold vestlet second is in the lower section of the lower nested structure and coaxial,
The bottom for the interlayer that the fourth pipe and penta pipe are formed is sealing, and passes through quoit sealing flange and the cold cover
The upper end vacuum sealing of Guan Yi connects.
It preferably, further include a cold vestlet first, cold vestlet first is coaxial to be set in except cold vestlet second, the cold vestlet first
There are screw thread in upper end and second pipe lower end, and the two is connected through a screw thread.
Preferably, it is separately provided for introducing the optical window of light, and this two groups of light in the first pipe and cold vestlet second
Window height is learned to be consistent.
Preferably, the own pipe is fixedly installed with radiation protection piece；Pipe in heptan is also had additional, manages coaxial be set in own pipe heptan
Portion, pipe in heptan lower end are connected with own bottom of the tube, and the upper end is connected with cylinder penta.The material of the pipe in heptan is oxygen-free copper.
The present invention realizes that technical solution used by above-mentioned purpose may also is that
Sample cavity of the present invention for restricted clearance be independent and dismountable low-loss liquid helium Dewar, including increasing diameter
Three cylinders, are referred to as from thick to thin: cylinder first, cylinder fourth, cylinder penta, they are coaxial to be set in together, and is vertically arranged, in composition
Nested structure,
Further include three root canals of increasing diameter, be referred to as from thick to thin: first pipe, Ding Guan, penta pipe, their coaxial suits
Together, lower nested structure is constituted, the lower nested structure is in the lower section of the upper nested structure and coaxial,
The upper end of the cylinder first and upper capping first are tightly connected, and the lower end of the cylinder first and lower capping first are tightly connected, institute
The lower end for stating lower capping first is connected by way of flange seal with the upper end of the first pipe,
The upper end of the cylinder fourth and upper capping fourth are tightly connected, and the upper capping fourth is fixedly installed with On Tranofer Tube For Liquid Helium, institute
The lower end and lower capping fourth for stating a fourth are tightly connected, and the lower end of the lower capping fourth passes through vacuum-packed mode and the fourth pipe
Upper end be connected,
The lower end of the cylinder penta is connected by vacuum-packed mode with the upper end of penta pipe,
It further include cold vestlet second, the cold vestlet second is in the lower section of the lower nested structure and coaxial,
The bottom for the interlayer that the fourth pipe and penta pipe are formed is also sealing, and passes through quoit sealing flange and institute
The upper end vacuum sealing connection of cold vestlet second is stated,
The outer surface of the lower capping fourth is provided with active carbon, and the outer surface of the cylinder fourth is wound with alternate multilayer aluminum
Film and vacuum insulation fibrous paper, the outer surface of the fourth pipe are also wound with alternate multilayer aluminum laminated films and vacuum insulation fiber
It is separately provided in paper, the first pipe and the cold vestlet second introducing the optical window of light, and this two groups of optical windows
Height is consistent.
Compared with prior art, provided by the present invention for the independent and dismountable low-loss liquid of the sample cavity of restricted clearance
Helium Dewar, has the following beneficial effects:
This is used for the sample cavity in the independent and dismountable low-loss liquid helium Dewar of sample cavity of restricted clearance by penta He of cylinder
Penta pipe connects and composes, it is seen then that 1. the sample cavity is independently arranged, and is applicable to various samples test and measurement, this is independent
Sample cavity can be brought using upper great benefit, such as the exchanging gas of cooling sample can be passed through in low-temperature measurement, be allowed
Sample drops to lower temperature, meets more harsh measurement demand；
Moreover, this is used in the independent and dismountable low-loss liquid helium Dewar of sample cavity of restricted clearance, due to having 2.
High compact multilayered structure setting, thus, in the case where guaranteeing the enough situations of Dewar outer diameter, it is ensured that sample cavity has sufficiently large
Internal diameter can so as to the low-temperature measurement being suitable under the space environment that internal-and external diameter is limited, such as the low-temperature measurement in magnet
Us are helped to realize the physical property measurement under extreme condition；
Moreover, this is used in the independent and dismountable low-loss liquid helium Dewar of sample cavity of restricted clearance, due to use
Quoit sealing flange can also be dismantled while sealing, thus, in double cold cover structures, pass through quoit sealing flange, energy
It enough enables and realizes and be detachably connected between the lower section (i.e. fourth pipe and penta pipe formed interlayer bottom) of sample cavity and cold vestlet second；Or
Person, in single cold cover structure, by quoit sealing flange, can enable realized between the lower section of sample cavity and cold vestlet first it is removable
Unload connection；It is also removable in addition, outermost first pipe is due to being also flanged joint, thus, it is possible to by cold cover structure and
Pipe first disassembles from the lower section of sample cavity simultaneously and (meets the detachability between 3. sample cavity and cold cover structure), such energy
It greatly facilitates us and replaces measuring device and sample.It is detachable that sample cavity is also taken into account while meeting high compact, greatly
The application for facilitating Dewar, more easily replacement sample；
Finally, the independent and dismountable low-loss liquid helium Dewar of sample cavity for being used for restricted clearance has also done more wounds
It is new: 4. liquid nitrogen being introduced into the sample cavity outside sandwich in restricted clearance, to strengthen insulation, protects liquid helium, is greatly reduced
The loss of liquid helium.
Further, independent and dismountable low-loss liquid helium Dewar provided by the present invention for the sample cavity of restricted clearance
In, it is additionally provided with 5. optical window, light can be introduced under extreme conditions, can be used for more measuring occasion.Whole device knot
Structure is simple, easy to operate, can apply in the measurement occasion of more extreme physical property, the effect used has relative to traditional approach
It is apparent progressive, there is huge promotion in performance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the basic model that the embodiment of the present invention 1 provides is used for the sample cavity of restricted clearance independently and dismountable low damage
Consume the structural schematic diagram of liquid helium Dewar.
Fig. 2 is the partial enlarged view in the region F in Fig. 1.
Fig. 3 is the partial enlarged view in the region G in Fig. 1.
Fig. 4 is that the sample cavity for restricted clearance for the single-tube that the embodiment of the present invention 2 provides is independent and dismountable low
The structural schematic diagram of liquid helium Dewar is lost.
Fig. 5 is the partial enlarged view of a-quadrant in Fig. 4.
Fig. 6 is the partial enlarged view of B area in Fig. 4.
Fig. 7 is that the sample cavity for restricted clearance for the aneroid nitrogen layer type that the embodiment of the present invention 3 provides is independent and detachable
Low-loss liquid helium Dewar structural schematic diagram.
Fig. 8 is the partial enlarged view of a-quadrant in Fig. 7.
Fig. 9 is the independent and dismountable low-loss liquid of the three kinds provided in an embodiment of the present invention sample cavities for restricted clearance
The appearance diagram of helium Dewar.
In figure:
1, cylinder first；2, cylinder second；3, cylinder third；4, cylinder fourth；5, cylinder penta；6, oneself manages；7, heptan manages；
8, upper capping first；9, upper capping second；10, upper capping third；11, upper capping fourth；
12, lower capping first；13, lower capping second；14, lower capping third；15, lower capping fourth；
16, On Tranofer Tube For Liquid Helium；17, liquid nitrogen transfusion pipe；18, capillary；19, radiation protection piece；20, alternate multilayer aluminum is thin
Film and vacuum insulation fibrous paper；
21, first pipe；22, second pipe；23, the third pipe；24, Ding Guan；25, penta pipe；
26, cold vestlet first；27, cold vestlet second；28, active carbon.
Below by way of specific embodiment and Structure Figure, the invention will be further elaborated.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to
Specific embodiment, the present invention is further explained.
Embodiment 1: sample cavity of the basic model for restricted clearance be independent and dismountable low-loss liquid helium Dewar
Referring to attached drawing 1 to attached drawing 3 and attached drawing 9, this is used for the independent and dismountable low-loss liquid of sample cavity of restricted clearance
Helium Dewar includes five cylinders of increasing diameter, is referred to as from thick to thin: cylinder first 1, cylinder second 2, cylinder the third 3, cylinder fourth 4, cylinder penta
5, they are coaxial to be set in together, and the axis is vertically arranged, nested structure in composition, upper nested structure and upper capping first 8,
Upper capping second 9, upper capping the third 10, upper capping fourth 11, lower capping first 12, lower capping second 13, it is lower cover the third 14, lower capping fourth 15,
Own pipe 6 together forms the cavity of storage liquid nitrogen, stores the vacuum layer between the cavity and the two cavitys of liquid helium,
Further include five root canals of increasing diameter, is referred to as from thick to thin: first pipe 21, second pipe 22, the third pipe 23, Ding Guan
24, penta pipe 25, they are coaxial to be set in together, and constitutes lower nested structure, the lower nested structure is coaxial with upper nested structure and locates
In below, lower nested structure constitutes liquid nitrogen bath, liquid helium bath, the lower part of two vacuum interlayers,
The upper end of cylinder first 1 is referred to as upper to cover first 8 by lidstock, and the lower end of cylinder first 1 is by lidstock, referred to as lower capping
12, the lower end of lower capping 12 is connected by flange seal with 21 upper end of first pipe, and the benefit by flange seal is both to have guaranteed very
Sky, but be it is removable so that the outermost layer of Dewar be it is dismountable,
The upper end of cylinder second 2 is by lidstock, and referred to as upper to cover second 9, upper capping second 9 is fixedly installed with perfusion tube, referred to as liquid
Nitrogen perfusion tube 17 is used to convey liquid nitrogen for liquid nitrogen cavity；The lower end of cylinder second 2 is referred to as lower to cover second 13, lower capping by lidstock
The lower end of second 13 is connected by vacuum sealing with 22 upper end of second pipe,
The upper end of cylinder the third 3 is by lidstock, referred to as upper capping the third 10, and the lower end of cylinder the third 3 is by lidstock, referred to as lower capping
The third 14, the lower end of lower capping the third 14 is connected by vacuum sealing with 23 upper end of the third pipe,
The upper end of cylinder fourth 4 is by lidstock, and referred to as upper to cover fourth 11, upper capping fourth 11 is fixedly installed with perfusion tube, referred to as
On Tranofer Tube For Liquid Helium 16 is used to convey liquid helium for liquid helium cavity, and the lower end of cylinder fourth 4 is referred to as lower to cover fourth 15, lower envelope by lidstock
The lower end of lid fourth 15 is connected by vacuum sealing with 24 upper end of fourth pipe, and the lower end of cylinder penta 5 passes through in vacuum sealing and penta pipe 25
End is connected,
Upper 8 top of capping first and upper capping second are tightly connected between 9 top by own pipe 6, and own pipe 6 is coaxially placed on cylinder penta
Except 5,
It further include cold vestlet first 26 and cold vestlet second 27, cold vestlet first 26 is coaxial to be sleeved on except cold vestlet second 27, is constituted
Double cold cover structures, this pair of cold cover structure and lower nested structure are coaxial and in the bottom, double cold cover structures and lower nested structure phase
Even,
Cylinder penta 5, penta pipe 25, cold vestlet second 27 together form sample cavity, and the diameter of three can not wait,
First pipe 21, cold vestlet first 26, cold vestlet second 27 have opposite optical window, and this three groups of optical window height
It is consistent, the presence of optical window can introduce light under extreme conditions, can be used for more measuring occasion.
The bottom for the interlayer that second pipe 22 and the third pipe 23 are formed is sealing, and passes through fastener and cold 26 upper end phase of vestlet first
Connection, fastener make cold vestlet first 26 be that removably, what it is due to cold vestlet first 26 is oxygen-free copper, and oxygen-free copper material is conducive to lead
Heat, cold vestlet first 26 is connected with liquid nitrogen cold drop, so that its temperature remains the temperature of liquid nitrogen, to play the work of isolation heat radiation
With,
The bottom for the interlayer that fourth pipe 24 and penta pipe 25 are formed is also sealing, and passes through quoit sealing flange and cold vestlet
The connection of 27 upper end vacuum sealing of second, quoit sealing flange make cold vestlet second 27 be removably, so that sample chamber is can
Disassembly, quoit sealing flange is indium Feng Falan, and indium envelope flange can reach the vacuum sealing under low temperature, and quoit sealing is set
Meter sample cavity can be allowed to separate with the vacuum layer, make sample cavity be it is independent, independent sample cavity can lead to exchange gas when in use
Cool down to sample, sample can be made to reach lower temperature, but does not interfere with the vacuum degree of vacuum layer again simultaneously,
Since cold vestlet second 27 is connected with liquid helium cold drop, the material of cold vestlet second 27 is also oxygen-free copper, protects own temperature
The temperature for liquid helium is held, guarantees to reach and keep for a long time required low temperature when sample is placed in cavity,
Own pipe 6 is fixedly installed with radiation protection piece 19, adds pipe in heptan 7, inside coaxial suit and own pipe 6, lower end and oneself
6 bottom of pipe is connected, and the upper end and cylinder penta 5 is connected, and heptan, the material of pipe 7 was oxygen-free copper, and heptan, the presence of pipe 7 made the outer layer of cylinder penta 5
More one layer of low temperature cold cover, play the role of isolation heat radiation, reduce liquid helium loss,
It is provided with capillary 18 in upper capping first 8, the other end of the capillary 18 is inserted into fourth pipe 24 and the formation of penta pipe 25
Interlayer among, capillary can be used to detach air in interlayer, convenient for the filling of liquid helium,
The outer surface of cylinder fourth 4 is fixedly installed with alternate multilayer aluminum laminated films and vacuum insulation fibrous paper 20, lower capping 15
Outer surface be provided with active carbon 28, alternate multilayer aluminum laminated films and vacuum insulation fibrous paper 20 and active carbon 28 are provided to
Heat insulating function is played, liquid helium is protected.
Embodiment 2: the sample cavity for restricted clearance of single-tube is independent and dismountable low-loss liquid helium Dewar
Referring to attached drawing 4 to attached drawing 6 and attached drawing 9, five cylinders including increasing diameter are referred to as: cylinder first from thick to thin
1, cylinder second 2, cylinder the third 3, cylinder fourth 4, cylinder penta 5, they are coaxial to be set in together, and the axis is vertically arranged, nested knot in composition
Structure,
Further include four root canals of increasing diameter, be referred to as from thick to thin: first pipe 21, second pipe 22, Ding Guan 24, penta are managed
25, they are coaxial to be set in together, and constitutes lower nested structure, the lower nested structure is coaxial with upper nested structure and is under it
Side,
The upper end of cylinder first 1 is referred to as upper to cover first 8 by lidstock, and the lower end of cylinder first 1 is by lidstock, referred to as lower capping
The lower end of first 12, lower capping first 12 is connected by flange seal with 21 upper end of first pipe, and the upper end of cylinder second 2 is claimed by lidstock
For upper capping second 9, upper capping second 9 is fixedly installed with perfusion tube, referred to as liquid nitrogen transfusion pipe 17, the lower end of cylinder second 2 by lidstock,
Referred to as lower to cover second 13, the upper end of cylinder the third 3 is by lidstock, and referred to as upper capping the third 10, the lower end of cylinder third is by lidstock, referred to as
Lower capping the third 14, the upper end of cylinder fourth 4 is by lidstock, and referred to as upper to cover fourth 11, upper capping fourth 11 is fixedly installed with perfusion tube, title
For On Tranofer Tube For Liquid Helium 16, the lower end of cylinder fourth is by lidstock, and referred to as lower to cover fourth 15, the lower end of lower capping fourth 15 is close by vacuum
24 upper end of Feng Yuding pipe is connected, and the lower end of cylinder penta 5 is connected by vacuum sealing with penta pipe, 25 upper end,
Upper 8 top of capping first and upper capping second are tightly connected between 9 top by own pipe 6, and own pipe 6 is coaxially placed on cylinder penta
Except 5,
It further include cold vestlet second 27, cold vestlet second 27 is coaxial with lower nested structure,
The bottom for the interlayer that lower capping second 13 and lower capping the third 14 are formed is sealing, and passes through sealing welding and second pipe 22
Upper end is connected,
The bottom for the interlayer that fourth pipe 24 and penta pipe 25 are formed is also sealing, and passes through quoit sealing flange and cold vestlet
The connection of 27 upper end vacuum sealing of second,
It can also include a cold vestlet first 26, cold vestlet first 26 is coaxial to be set in except cold vestlet second 27, cold vestlet first
There are screw thread in 26 upper ends and 22 lower end of second pipe, and are connected through a screw thread,
First pipe 21, cold vestlet second 27 has opposite optical window, and this two groups of optical window height are consistent,
Pipe 6 is fixedly installed with radiation protection piece 19, adds pipe in heptan 7, inside coaxial suit and own pipe 6, lower end and own pipe 6
Bottom is connected, and the upper end and cylinder penta 5 is connected.The material of the pipe in heptan 7 is oxygen-free copper.
Embodiment 3: the sample cavity for restricted clearance of aneroid nitrogen layer type is independent and dismountable low-loss liquid helium Dewar
Referring to attached drawing 7 to attached drawing 9, three cylinders including increasing diameter are referred to as from thick to thin: cylinder first 1, cylinder fourth 4,
Cylinder penta 5, they are coaxial to be set in together, and the axis is vertically arranged, nested structure in composition,
Further include three root canals of increasing diameter, be referred to as from thick to thin: first pipe 21, Ding Guan 24, penta pipe 25, they are total
Axle sleeve is fitted together, and constitutes lower nested structure, and the lower nested structure is coaxial and in the bottom with upper nested structure,
The upper end of cylinder first 1 is referred to as upper to cover first 8 by lidstock, and the lower end of cylinder first 1 is by lidstock, referred to as lower capping
The lower end of first 12, lower capping first 12 is connected by flange seal with 21 upper end of first pipe, and the upper end of cylinder fourth 4 is claimed by lidstock
For upper capping fourth 11, upper capping fourth 11 is fixedly installed with perfusion tube, referred to as On Tranofer Tube For Liquid Helium 16, and the lower end of cylinder fourth is close by covering
Envelope, referred to as lower to cover fourth 15, the lower end of lower capping fourth 15 is connected by vacuum sealing with 24 upper end of fourth pipe, the lower end of cylinder penta 5
It is connected by vacuum sealing with penta pipe, 25 upper end,
Further include cold vestlet second 27, cold vestlet second 27 and lower nested structure are coaxial and in the bottom, cylinder penta 5, penta pipe 25,
Cold 27 three of vestlet second together forms an independent sample cavity,
The bottom for the interlayer that fourth pipe 24 and penta pipe 25 are formed is also sealing, and passes through quoit sealing flange and cold vestlet
The connection of 27 upper end vacuum sealing of second,
The outer surface of lower capping fourth 15 is provided with active carbon 28, and it is thin that the outer surface of cylinder fourth 4 is wound with alternate multilayer aluminum
Film and vacuum insulation fibrous paper 20, the outer surface of Ding Guan 24 are also wound with alternate multilayer aluminum laminated films and vacuum insulation fiber
Paper,
First pipe 21, cold vestlet second 27 has opposite optical window, and this two groups of optical window height are consistent.
It should be noted that the invention patent be for restricted clearance sample cavity is independent and dismountable low-loss liquid helium
Dewar can be implemented altogether there are three types of scheme:
Independent for the sample cavity for restricted clearance of basic model and single-tube and dismountable low-loss liquid helium Dewar,
In use, then, successively injection liquid nitrogen and liquid helium, the cavity of liquid nitrogen are located at liquid helium cavity firstly, to vacuumize for whole device
Outer layer, cylinder second 2, cylinder the third 3, own pipe 6, upper capping second 13, upper capping the third 14, lower capping second 9, it is lower cover the third 10, constitute together
The cold account cavity of liquid nitrogen, plays liquid helium protective effect, 7 lower end of pipe in heptan is allowed to be connected with own 6 bottom of pipe, penta 5 phase of the upper end and cylinder
Even, so that its own is become the insulation of liquid nitrogen temperature and shield cold cover, can further decrease the loss of liquid helium, insulation effect more preferably,
1) sample cavity for basic model for restricted clearance is independent and dismountable low-loss liquid helium Dewar, we will also
Liquid nitrogen is introduced into the interlayer outside the sample cavity in restricted clearance, guarantees liquid nitrogen layer and liquid helium interlayer is not in hot short-circuit conditions,
Liquid nitrogen cold drop and liquid helium cold drop are constituted, in order to enable liquid helium cold drop can be full of liquid helium, we are also creative to be provided with capillary
Pipe, capillary can play the role of pumping, and the liquid helium cold drop of narrow space, liquid nitrogen and liquid helium interlayer difference are entered convenient for liquid helium
It is connected to cold vestlet first 26 and cold vestlet second 27, double cold cover structures can obtain excellent insulation effect, greatly reduce liquid helium
Loss, double cold cover structures and be also designed as dismountable, be conveniently replaceable sample, we are used at low temperature this Dewar into
Capable measurement provides great convenience, effectively increases the functionality of its own,
2) independent for the sample cavity for restricted clearance of single-tube and dismountable low-loss liquid helium Dewar, we do not have
Have and liquid nitrogen is introduced into the interlayer outside the sample cavity in restricted clearance, that is, there is no liquid nitrogen cold drop, lower capping second 13 and lower capping third
The bottom of 14 interlayers formed is sealing, and is connected by sealing welding with 22 upper end of second pipe, we are replaced with second pipe 22
Liquid nitrogen cold drop can further reduce the outer diameter of part under entire Dewar, and it is bigger to enable it to applicable range, basic herein
On, a cold vestlet first 26 can also be threadedly coupled in 22 lower end of second pipe both do not had since the two is in such a way that screw thread is screwed on
Have and expand whole diameter, also further next self cooling 27 liquid helium heat radiation of vestlet second is shielded, strengthens insulation, is imitated
Fruit more preferably,
3) independent for the sample cavity for restricted clearance of aneroid nitrogen layer type and dismountable low-loss liquid helium Dewar, I
Do not use liquid helium layer, further subtract the outer diameter of the lower half portion of lower whole Dewar, in order to be insulated, we are using all
The periphery of liquid helium layer all wind the schemes of alternate multilayer aluminum laminated films and vacuum insulation fibrous paper 20, can also reach fine
Insulation effect, and whole device is greatly simplified, so that practicability is more reinforced.In short, entirely design can be more for the invention
Good is applied in the space that internal-and external diameter is limited, for example be applied in magnet, for measuring some materials under extreme conditions
Property, and optical window is provided on Dewar, light can be introduced in measurement, the Dewar can be made to be suitable for more measurement fields
It closes, simultaneously because above-mentioned novel and excellent adiabatic scheme has been used, so that the invention is solved and used under extreme conditions
A series of problems that liquid helium Dewar measures, it is upper with very extensive prospect in application.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of sample cavity for restricted clearance is independent and dismountable low-loss liquid helium Dewar, it is characterised in that:
Five cylinders including increasing diameter, are referred to as from thick to thin: cylinder first (1), cylinder second (2), cylinder third (3), cylinder fourth (4),
Penta (5) of cylinder, they are coaxial to be set in together, and is vertically arranged, nested structure in composition,
Further include five root canals of increasing diameter, be referred to as from thick to thin: first pipe (21), second pipe (22), the third pipe (23), Ding Guan
(24), penta pipe (25), they are coaxial to be set in together, and constitutes lower nested structure, and the lower nested structure is in the upper nesting
The lower section of structure and coaxial,
The upper end of the cylinder first (1) and upper capping first (8) are tightly connected, and the lower end of the cylinder first (1) and lower capping first (12) are close
The lower end of envelope connection, lower capping first (12) is connected by way of flange seal with the upper end of the first pipe (21),
The upper end of the cylinder second (2) and upper capping second (9) are tightly connected, and the upper capping second (9) is fixedly installed with liquid nitrogen transfusion
It manages (17), the lower end of the cylinder second (2) and lower capping second (13) are tightly connected, and the lower end of lower capping second (13) passes through vacuum
The mode of sealing is connected with the upper end of the second pipe (22),
The upper end of the cylinder third (3) and third (10) of upper capping are tightly connected, and the lower end of the cylinder third (3) and third (14) of lower capping are close
The lower end of envelope connection, third (14) of the lower capping is connected by vacuum-packed mode with the upper end of third pipe (23),
The upper end of the cylinder fourth (4) and upper capping fourth (11) are tightly connected, and it is defeated that the upper capping fourth (11) is fixedly installed with liquid helium
Liquid pipe (16), the lower end of the cylinder fourth (4) and lower capping fourth (15) are tightly connected, and the lower end of lower capping fourth (15) passes through true
The mode of sky sealing is connected with the upper end of the fourth pipe (24),
The lower end of the cylinder penta (5) is connected by vacuum-packed mode with the upper end of penta pipe (25),
The top of third (10) of the upper capping and the top of upper capping second (9) are tightly connected with the both ends of oneself pipe (6) respectively,
Oneself pipe (6) is coaxially placed on except the cylinder penta (5),
It further include cold vestlet first (26) and cold vestlet second (27), the cold vestlet first (26) is coaxial to be sleeved on the cold vestlet second
(27) double cold cover structures are constituted except, double cold cover structures are in the lower section of the lower nested structure and coaxial,
The bottom for the interlayer that the second pipe (22) and third pipe (23) are formed is sealing, and passes through fastener and the cold cover
The upper end of pipe first (26) is connected,
The fourth pipe (24) and it is described penta pipe (25) formed interlayer bottom be sealing, and by quoit sealing flange with
The upper end vacuum sealing of the cold vestlet second (27) connects.
2. the sample cavity according to claim 1 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
Be characterized in that: the first pipe (21), the cold vestlet first (26) are separately provided on the cold vestlet second (27) introducing light
Optical window, and the height of this three groups of optical windows is consistent.
3. the sample cavity according to claim 1 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
It is characterized in that:
Oneself pipe (6) is fixedly installed with radiation protection piece (19),
It is additionally provided with pipe in heptan (7), the pipe in heptan (7) the coaxial inside for being set in oneself pipe (6) is managed under (7) heptan
It holds and is connected with oneself bottom of pipe (6), the upper end is connected with the cylinder penta (5), and the material of the pipe in heptan (7) is oxygen-free copper.
4. the sample cavity according to claim 1 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
It is characterized in that: being provided with capillary (18) on the upper capping first (8), the other end of the capillary (18) is inserted into the fourth
Among the interlayer for managing (24) and penta pipe (25) formation.
5. the sample cavity according to claim 1 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
Be characterized in that: the outer surface of the cylinder fourth (4) is fixedly installed with alternate multilayer aluminum laminated films and vacuum insulation fibrous paper (20),
The outer surface of lower capping fourth (15) is provided with active carbon (28).
6. a kind of sample cavity for restricted clearance is independent and dismountable low-loss liquid helium Dewar, it is characterised in that:
Five cylinders including increasing diameter, are referred to as from thick to thin: cylinder first (1), cylinder second (2), cylinder third (3), cylinder fourth (4),
Penta (5) of cylinder, they are coaxial to be set in together, and is vertically arranged the upper nested structure of composition,
Further include four root canals of increasing diameter, be referred to as from thick to thin: first pipe (21), second pipe (22), fourth pipe (24), penta pipe
(25), they it is coaxial be set in together, constitute lower nested structure, the lower nested structure is in the lower section of the upper nested structure
And it is coaxial,
The upper end of the cylinder first (1) and upper capping first (8) are tightly connected, and the lower end of the cylinder first (1) and lower capping first (12) are close
The lower end of envelope connection, lower capping first (12) is connected by way of flange seal with the upper end of the first pipe (21),
The upper end of the cylinder second (2) and upper capping second (9) are tightly connected, and the upper capping second (9) is fixedly installed with liquid nitrogen transfusion
It manages (17), the lower end of the cylinder second (2) and lower capping second (13) are tightly connected,
The upper end of the cylinder third (3) and third (10) of upper capping are tightly connected, and the lower end of the cylinder third (3) and third (14) of lower capping are close
Envelope connection,
The bottom for the interlayer that lower capping second (13) and third (14) of the lower capping are formed is sealing, and passes through sealing welding
Mode be connected with the upper end of second pipe (22),
The upper end of the cylinder fourth (4) and upper capping fourth (11) are tightly connected, and it is defeated that the upper capping fourth (11) is fixedly installed with liquid helium
Liquid pipe (16), the lower end of the cylinder fourth (4) and lower capping fourth (15) are tightly connected, and the lower end of lower capping fourth (15) passes through true
The mode of sky sealing is connected with the upper end of the fourth pipe (24),
The lower end of the cylinder penta (5) is connected by vacuum-packed mode with the upper end of penta pipe (25),
The top of third (10) of the upper capping and the top of upper capping second (9) are tightly connected with the both ends of oneself pipe (6) respectively,
Oneself pipe (6) is coaxially placed on except cylinder penta (5),
It further include cold vestlet second (27), the cold vestlet second (27) is in the lower section of the lower nested structure and coaxial,
The fourth pipe (24) with penta pipe (25) formed interlayer bottom be sealing, and by quoit sealing flange with it is described
The upper end vacuum sealing of cold vestlet second (27) connects.
7. the sample cavity according to claim 6 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
Be characterized in that: further including a cold vestlet first (26), the cold vestlet first (26) is coaxial be set in the cold vestlet second (27) it
Outside, there are screw thread in the upper end of the cold vestlet first (26) and the lower end of the second pipe (22), and are connected through a screw thread between the two.
8. the sample cavity according to claim 6 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
It is characterized in that: being separately provided for introducing the optical window of light, and this on the first pipe (21) and the cold vestlet second (27)
The height of two groups of optical windows is consistent.
9. the sample cavity according to claim 6 for restricted clearance is independent and dismountable low-loss liquid helium Dewar,
It is characterized in that:
Oneself pipe (6) is fixedly installed with radiation protection piece (19),
It is additionally provided with pipe in heptan (7), the pipe in heptan (7) the coaxial inside for being set in oneself pipe (6) is managed under (7) heptan
It holds and is connected with oneself bottom of pipe (6), the upper end is connected with the cylinder penta (5), and the material of the pipe in heptan (7) is oxygen-free copper.
10. a kind of sample cavity for restricted clearance is independent and dismountable low-loss liquid helium Dewar, it is characterised in that:
Three cylinders including increasing diameter, are referred to as from thick to thin: cylinder first (1), cylinder fourth (4), cylinder penta (5), they are coaxial
It is set in together, and is vertically arranged, nested structure in composition,
Further include three root canals of increasing diameter, is referred to as from thick to thin: first pipe (21), fourth pipe (24), penta pipe (25), they
It is coaxial to be set in together, lower nested structure is constituted, the lower nested structure is in the lower section of the upper nested structure and is total to it
Axis,
The upper end of the cylinder first (1) and upper capping first (8) are tightly connected, and the lower end of the cylinder first (1) and lower capping first (12) are close
The lower end of envelope connection, lower capping first (12) is connected by way of flange seal with the upper end of the first pipe (21),
The upper end of the cylinder fourth (4) and upper capping fourth (11) are tightly connected, and it is defeated that the upper capping fourth (11) is fixedly installed with liquid helium
Liquid pipe (16), the lower end of the cylinder fourth (4) and lower capping fourth (15) are tightly connected, and the lower end of lower capping fourth (15) passes through true
The mode of sky sealing is connected with the upper end of the fourth pipe (24),
The lower end of the cylinder penta (5) is connected by vacuum-packed mode with the upper end of penta pipe (25),
It further include cold vestlet second (27), the cold vestlet second (27) is in the lower section of the lower nested structure and coaxial,
The bottom for the interlayer that the fourth pipe (24) and penta pipe (25) are formed is also sealing, and passes through quoit sealing flange
It is connect with the upper end vacuum sealing of the cold vestlet second (27),
The outer surface of lower capping fourth (15) is provided with active carbon (28), and the outer surface of the cylinder fourth (4) is wound with alternately
Multilayer aluminum laminated films and vacuum insulation fibrous paper, the outer surface of the fourth pipe (24) be also wound with alternate multilayer aluminum laminated films and
It is separately provided for introducing the optical window of light on vacuum insulation fibrous paper, the first pipe (21) and the cold vestlet second (27)
Mouthful, and the height of this two groups of optical windows is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811635596.7A CN109695985B (en) | 2018-12-29 | 2018-12-29 | Low loss liquid helium dewar with independent and detachable sample chamber for confined space |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811635596.7A CN109695985B (en) | 2018-12-29 | 2018-12-29 | Low loss liquid helium dewar with independent and detachable sample chamber for confined space |
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| CN109695985B CN109695985B (en) | 2020-06-26 |
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|---|---|---|---|---|
| US4218892A (en) * | 1979-03-29 | 1980-08-26 | Nasa | Low cost cryostat |
| US4367743A (en) * | 1976-05-24 | 1983-01-11 | Virginia M. Gregory | Self-pressurizing cryogenic apparatus and method |
| CN2052516U (en) * | 1989-07-13 | 1990-02-07 | 何曙安 | Dewar flask of change temp. using liquid nitrogen |
| CN105738400A (en) * | 2016-04-13 | 2016-07-06 | 安徽万瑞冷电科技有限公司 | Low-temperature adsorption material analysis and characterization system |
| CN207849851U (en) * | 2018-01-15 | 2018-09-11 | 北京市朝阳区长安机电技术研究所 | The liquid nitrogen metal Dewar bottle of slow cooling |
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2018
- 2018-12-29 CN CN201811635596.7A patent/CN109695985B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4367743A (en) * | 1976-05-24 | 1983-01-11 | Virginia M. Gregory | Self-pressurizing cryogenic apparatus and method |
| US4218892A (en) * | 1979-03-29 | 1980-08-26 | Nasa | Low cost cryostat |
| CN2052516U (en) * | 1989-07-13 | 1990-02-07 | 何曙安 | Dewar flask of change temp. using liquid nitrogen |
| CN105738400A (en) * | 2016-04-13 | 2016-07-06 | 安徽万瑞冷电科技有限公司 | Low-temperature adsorption material analysis and characterization system |
| CN207849851U (en) * | 2018-01-15 | 2018-09-11 | 北京市朝阳区长安机电技术研究所 | The liquid nitrogen metal Dewar bottle of slow cooling |
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| Publication number | Publication date |
|---|---|
| CN109695985B (en) | 2020-06-26 |
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